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package javax.swing;

import java.awt.event.*;
import java.awt.*;
import javax.swing.event.MenuKeyEvent;
import javax.swing.event.MenuKeyListener;

Manages all the ToolTips in the system.

ToolTipManager contains numerous properties for configuring how long it
will take for the tooltips to become visible, and how long till they
hide. Consider a component that has a different tooltip based on where
the mouse is, such as JTree. When the mouse moves into the JTree and
over a region that has a valid tooltip, the tooltip will become
visible after initialDelay milliseconds. After
dismissDelay milliseconds the tooltip will be hidden. If
the mouse is over a region that has a valid tooltip, and the tooltip
is currently visible, when the mouse moves to a region that doesn't have
a valid tooltip the tooltip will be hidden. If the mouse then moves back
into a region that has a valid tooltip within reshowDelay
milliseconds, the tooltip will immediately be shown, otherwise the
tooltip will be shown again after initialDelay milliseconds.
Author:
Dave Moore, Rich Schiavi
See Also:
createToolTip.createToolTip/**
 * Manages all the <code>ToolTips</code> in the system.
 * <p>
 * ToolTipManager contains numerous properties for configuring how long it
 * will take for the tooltips to become visible, and how long till they
 * hide. Consider a component that has a different tooltip based on where
 * the mouse is, such as JTree. When the mouse moves into the JTree and
 * over a region that has a valid tooltip, the tooltip will become
 * visible after <code>initialDelay</code> milliseconds. After
 * <code>dismissDelay</code> milliseconds the tooltip will be hidden. If
 * the mouse is over a region that has a valid tooltip, and the tooltip
 * is currently visible, when the mouse moves to a region that doesn't have
 * a valid tooltip the tooltip will be hidden. If the mouse then moves back
 * into a region that has a valid tooltip within <code>reshowDelay</code>
 * milliseconds, the tooltip will immediately be shown, otherwise the
 * tooltip will be shown again after <code>initialDelay</code> milliseconds.
 *
 * @see JComponent#createToolTip
 * @author Dave Moore
 * @author Rich Schiavi
 */
public class ToolTipManager extends MouseAdapter implements MouseMotionListener  {
    Timer enterTimer, exitTimer, insideTimer;
    String toolTipText;
    Point  preferredLocation;
    JComponent insideComponent;
    MouseEvent mouseEvent;
    boolean showImmediately;
    private static final Object TOOL_TIP_MANAGER_KEY = new Object();
    transient Popup tipWindow;
    
The Window tip is being displayed in. This will be non-null if
the Window tip is in differs from that of insideComponent's Window.
/** The Window tip is being displayed in. This will be non-null if
     * the Window tip is in differs from that of insideComponent's Window.
     */
    private Window window;
    JToolTip tip;

    private Rectangle popupRect = null;
    private Rectangle popupFrameRect = null;

    boolean enabled = true;
    private boolean tipShowing = false;

    private FocusListener focusChangeListener = null;
    private MouseMotionListener moveBeforeEnterListener = null;
    private KeyListener accessibilityKeyListener = null;

    private KeyStroke postTip;
    private KeyStroke hideTip;

    // PENDING(ges)
    protected boolean lightWeightPopupEnabled = true;
    protected boolean heavyWeightPopupEnabled = false;

    ToolTipManager() {
        enterTimer = new Timer(750, new insideTimerAction());
        enterTimer.setRepeats(false);
        exitTimer = new Timer(500, new outsideTimerAction());
        exitTimer.setRepeats(false);
        insideTimer = new Timer(4000, new stillInsideTimerAction());
        insideTimer.setRepeats(false);

        moveBeforeEnterListener = new MoveBeforeEnterListener();
        accessibilityKeyListener = new AccessibilityKeyListener();

        postTip = KeyStroke.getKeyStroke(KeyEvent.VK_F1, InputEvent.CTRL_MASK);
        hideTip =  KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
    }

    
Enables or disables the tooltip.
Params:
flag –  true to enable the tip, false otherwise/**
     * Enables or disables the tooltip.
     *
     * @param flag  true to enable the tip, false otherwise
     */
    public void setEnabled(boolean flag) {
        enabled = flag;
        if (!flag) {
            hideTipWindow();
        }
    }

    
Returns true if this object is enabled.
Returns:
true if this object is enabled, false otherwise/**
     * Returns true if this object is enabled.
     *
     * @return true if this object is enabled, false otherwise
     */
    public boolean isEnabled() {
        return enabled;
    }

    
When displaying the JToolTip, the
ToolTipManager chooses to use a lightweight
JPanel if it fits. This method allows you to
disable this feature. You have to do disable it if your
application mixes light weight and heavy weights components.
Params:
aFlag – true if a lightweight panel is desired, false otherwise/**
     * When displaying the <code>JToolTip</code>, the
     * <code>ToolTipManager</code> chooses to use a lightweight
     * <code>JPanel</code> if it fits. This method allows you to
     * disable this feature. You have to do disable it if your
     * application mixes light weight and heavy weights components.
     *
     * @param aFlag true if a lightweight panel is desired, false otherwise
     *
     */
    public void setLightWeightPopupEnabled(boolean aFlag){
        lightWeightPopupEnabled = aFlag;
    }

    
Returns true if lightweight (all-Java) Tooltips
are in use, or false if heavyweight (native peer)
Tooltips are being used.
Returns:
true if lightweight ToolTips are in use/**
     * Returns true if lightweight (all-Java) <code>Tooltips</code>
     * are in use, or false if heavyweight (native peer)
     * <code>Tooltips</code> are being used.
     *
     * @return true if lightweight <code>ToolTips</code> are in use
     */
    public boolean isLightWeightPopupEnabled() {
        return lightWeightPopupEnabled;
    }


    
Specifies the initial delay value.
Params:
milliseconds –  the number of milliseconds to delay
       (after the cursor has paused) before displaying the
       tooltip
See Also:
getInitialDelay/**
     * Specifies the initial delay value.
     *
     * @param milliseconds  the number of milliseconds to delay
     *        (after the cursor has paused) before displaying the
     *        tooltip
     * @see #getInitialDelay
     */
    public void setInitialDelay(int milliseconds) {
        enterTimer.setInitialDelay(milliseconds);
    }

    
Returns the initial delay value.
See Also:
setInitialDelay
Returns:
an integer representing the initial delay value,
         in milliseconds/**
     * Returns the initial delay value.
     *
     * @return an integer representing the initial delay value,
     *          in milliseconds
     * @see #setInitialDelay
     */
    public int getInitialDelay() {
        return enterTimer.getInitialDelay();
    }

    
Specifies the dismissal delay value.
Params:
milliseconds –  the number of milliseconds to delay
       before taking away the tooltip
See Also:
getDismissDelay/**
     * Specifies the dismissal delay value.
     *
     * @param milliseconds  the number of milliseconds to delay
     *        before taking away the tooltip
     * @see #getDismissDelay
     */
    public void setDismissDelay(int milliseconds) {
        insideTimer.setInitialDelay(milliseconds);
    }

    
Returns the dismissal delay value.
See Also:
setDismissDelay
Returns:
an integer representing the dismissal delay value,
         in milliseconds/**
     * Returns the dismissal delay value.
     *
     * @return an integer representing the dismissal delay value,
     *          in milliseconds
     * @see #setDismissDelay
     */
    public int getDismissDelay() {
        return insideTimer.getInitialDelay();
    }

    
Used to specify the amount of time before the user has to wait
initialDelay milliseconds before a tooltip will be
shown. That is, if the tooltip is hidden, and the user moves into
a region of the same Component that has a valid tooltip within
milliseconds milliseconds the tooltip will immediately
be shown. Otherwise, if the user moves into a region with a valid
tooltip after milliseconds milliseconds, the user
will have to wait an additional initialDelay
milliseconds before the tooltip is shown again.
Params:
milliseconds – time in milliseconds
See Also:
getReshowDelay/**
     * Used to specify the amount of time before the user has to wait
     * <code>initialDelay</code> milliseconds before a tooltip will be
     * shown. That is, if the tooltip is hidden, and the user moves into
     * a region of the same Component that has a valid tooltip within
     * <code>milliseconds</code> milliseconds the tooltip will immediately
     * be shown. Otherwise, if the user moves into a region with a valid
     * tooltip after <code>milliseconds</code> milliseconds, the user
     * will have to wait an additional <code>initialDelay</code>
     * milliseconds before the tooltip is shown again.
     *
     * @param milliseconds time in milliseconds
     * @see #getReshowDelay
     */
    public void setReshowDelay(int milliseconds) {
        exitTimer.setInitialDelay(milliseconds);
    }

    
Returns the reshow delay property.
See Also:
setReshowDelay
Returns:
reshown delay property/**
     * Returns the reshow delay property.
     *
     * @return reshown delay property
     * @see #setReshowDelay
     */
    public int getReshowDelay() {
        return exitTimer.getInitialDelay();
    }

    // Returns GraphicsConfiguration instance that toFind belongs to or null
    // if drawing point is set to a point beyond visible screen area (e.g.
    // Point(20000, 20000))
    private GraphicsConfiguration getDrawingGC(Point toFind) {
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice devices[] = env.getScreenDevices();
        for (GraphicsDevice device : devices) {
            GraphicsConfiguration configs[] = device.getConfigurations();
            for (GraphicsConfiguration config : configs) {
                Rectangle rect = config.getBounds();
                if (rect.contains(toFind)) {
                    return config;
                }
            }
        }

        return null;
    }

    void showTipWindow() {
        if(insideComponent == null || !insideComponent.isShowing())
            return;
        String mode = UIManager.getString("ToolTipManager.enableToolTipMode");
        if ("activeApplication".equals(mode)) {
            KeyboardFocusManager kfm =
                    KeyboardFocusManager.getCurrentKeyboardFocusManager();
            if (kfm.getFocusedWindow() == null) {
                return;
            }
        }
        if (enabled) {
            Dimension size;
            Point screenLocation = insideComponent.getLocationOnScreen();
            Point location;

            Point toFind;
            if (preferredLocation != null) {
                toFind = new Point(screenLocation.x + preferredLocation.x,
                        screenLocation.y + preferredLocation.y);
            } else {
                toFind = mouseEvent.getLocationOnScreen();
            }

            GraphicsConfiguration gc = getDrawingGC(toFind);
            if (gc == null) {
                toFind = mouseEvent.getLocationOnScreen();
                gc = getDrawingGC(toFind);
                if (gc == null) {
                    gc = insideComponent.getGraphicsConfiguration();
                }
            }

            Rectangle sBounds = gc.getBounds();
            Insets screenInsets = Toolkit.getDefaultToolkit()
                                             .getScreenInsets(gc);
            // Take into account screen insets, decrease viewport
            sBounds.x += screenInsets.left;
            sBounds.y += screenInsets.top;
            sBounds.width -= (screenInsets.left + screenInsets.right);
            sBounds.height -= (screenInsets.top + screenInsets.bottom);
        boolean leftToRight
                = SwingUtilities.isLeftToRight(insideComponent);

            // Just to be paranoid
            hideTipWindow();

            tip = insideComponent.createToolTip();
            tip.setTipText(toolTipText);
            size = tip.getPreferredSize();

            if(preferredLocation != null) {
                location = toFind;
        if (!leftToRight) {
            location.x -= size.width;
        }
            } else {
                location = new Point(screenLocation.x + mouseEvent.getX(),
                        screenLocation.y + mouseEvent.getY() + 20);
        if (!leftToRight) {
            if(location.x - size.width>=0) {
                location.x -= size.width;
            }
        }

            }

        // we do not adjust x/y when using awt.Window tips
        if (popupRect == null){
        popupRect = new Rectangle();
        }
        popupRect.setBounds(location.x,location.y,
                size.width,size.height);

        // Fit as much of the tooltip on screen as possible
            if (location.x < sBounds.x) {
                location.x = sBounds.x;
            }
            else if (location.x - sBounds.x + size.width > sBounds.width) {
                location.x = sBounds.x + Math.max(0, sBounds.width - size.width)
;
            }
            if (location.y < sBounds.y) {
                location.y = sBounds.y;
            }
            else if (location.y - sBounds.y + size.height > sBounds.height) {
                location.y = sBounds.y + Math.max(0, sBounds.height - size.height);
            }

            PopupFactory popupFactory = PopupFactory.getSharedInstance();

            if (lightWeightPopupEnabled) {
        int y = getPopupFitHeight(popupRect, insideComponent);
        int x = getPopupFitWidth(popupRect,insideComponent);
        if (x>0 || y>0) {
            popupFactory.setPopupType(PopupFactory.MEDIUM_WEIGHT_POPUP);
        } else {
            popupFactory.setPopupType(PopupFactory.LIGHT_WEIGHT_POPUP);
        }
            }
            else {
                popupFactory.setPopupType(PopupFactory.MEDIUM_WEIGHT_POPUP);
            }
        tipWindow = popupFactory.getPopup(insideComponent, tip,
                          location.x,
                          location.y);
            popupFactory.setPopupType(PopupFactory.LIGHT_WEIGHT_POPUP);

        tipWindow.show();

            Window componentWindow = SwingUtilities.windowForComponent(
                                                    insideComponent);

            window = SwingUtilities.windowForComponent(tip);
            if (window != null && window != componentWindow) {
                window.addMouseListener(this);
            }
            else {
                window = null;
            }

            insideTimer.start();
        tipShowing = true;
        }
    }

    void hideTipWindow() {
        if (tipWindow != null) {
            if (window != null) {
                window.removeMouseListener(this);
                window = null;
            }
            tipWindow.hide();
            tipWindow = null;
            tipShowing = false;
            tip = null;
            insideTimer.stop();
        }
    }

    
Returns a shared ToolTipManager instance.
Returns:
a shared ToolTipManager object/**
     * Returns a shared <code>ToolTipManager</code> instance.
     *
     * @return a shared <code>ToolTipManager</code> object
     */
    public static ToolTipManager sharedInstance() {
        Object value = SwingUtilities.appContextGet(TOOL_TIP_MANAGER_KEY);
        if (value instanceof ToolTipManager) {
            return (ToolTipManager) value;
        }
        ToolTipManager manager = new ToolTipManager();
        SwingUtilities.appContextPut(TOOL_TIP_MANAGER_KEY, manager);
        return manager;
    }

    // add keylistener here to trigger tip for access
    
Registers a component for tooltip management.

This will register key bindings to show and hide the tooltip text
only if component has focus bindings. This is done
so that components that are not normally focus traversable, such
as JLabel, are not made focus traversable as a result
of invoking this method.
Params:
component –  a JComponent object to add
See Also:
Component.isFocusTraversable/**
     * Registers a component for tooltip management.
     * <p>
     * This will register key bindings to show and hide the tooltip text
     * only if <code>component</code> has focus bindings. This is done
     * so that components that are not normally focus traversable, such
     * as <code>JLabel</code>, are not made focus traversable as a result
     * of invoking this method.
     *
     * @param component  a <code>JComponent</code> object to add
     * @see JComponent#isFocusTraversable
     */
    public void registerComponent(JComponent component) {
        component.removeMouseListener(this);
        component.addMouseListener(this);
        component.removeMouseMotionListener(moveBeforeEnterListener);
        component.addMouseMotionListener(moveBeforeEnterListener);
        // use MenuKeyListener for menu items/elements
        if (component instanceof JMenuItem) {
            ((JMenuItem) component).removeMenuKeyListener((MenuKeyListener) accessibilityKeyListener);
            ((JMenuItem) component).addMenuKeyListener((MenuKeyListener) accessibilityKeyListener);
        } else {
            component.removeKeyListener(accessibilityKeyListener);
            component.addKeyListener(accessibilityKeyListener);
        }
    }

    
Removes a component from tooltip control.
Params:
component –  a JComponent object to remove/**
     * Removes a component from tooltip control.
     *
     * @param component  a <code>JComponent</code> object to remove
     */
    public void unregisterComponent(JComponent component) {
        component.removeMouseListener(this);
        component.removeMouseMotionListener(moveBeforeEnterListener);
        if (component instanceof JMenuItem) {
            ((JMenuItem) component).removeMenuKeyListener((MenuKeyListener) accessibilityKeyListener);
        } else {
            component.removeKeyListener(accessibilityKeyListener);
        }
    }

    // implements java.awt.event.MouseListener
    
 Called when the mouse enters the region of a component.
 This determines whether the tool tip should be shown.
 @param event  the event in question
/**
     *  Called when the mouse enters the region of a component.
     *  This determines whether the tool tip should be shown.
     *
     *  @param event  the event in question
     */
    public void mouseEntered(MouseEvent event) {
        initiateToolTip(event);
    }

    private void initiateToolTip(MouseEvent event) {
        if (event.getSource() == window) {
            return;
        }
        JComponent component = (JComponent)event.getSource();
        component.removeMouseMotionListener(moveBeforeEnterListener);

        exitTimer.stop();

        Point location = event.getPoint();
        // ensure tooltip shows only in proper place
        if (location.x < 0 ||
            location.x >=component.getWidth() ||
            location.y < 0 ||
            location.y >= component.getHeight()) {
            return;
        }

        if (insideComponent != null) {
            enterTimer.stop();
        }
        // A component in an unactive internal frame is sent two
        // mouseEntered events, make sure we don't end up adding
        // ourselves an extra time.
        component.removeMouseMotionListener(this);
        component.addMouseMotionListener(this);

        boolean sameComponent = (insideComponent == component);

        insideComponent = component;
    if (tipWindow != null){
            mouseEvent = event;
            if (showImmediately) {
                String newToolTipText = component.getToolTipText(event);
                Point newPreferredLocation = component.getToolTipLocation(
                                                         event);
                boolean sameLoc = (preferredLocation != null) ?
                            preferredLocation.equals(newPreferredLocation) :
                            (newPreferredLocation == null);

                if (!sameComponent || !toolTipText.equals(newToolTipText) ||
                         !sameLoc) {
                    toolTipText = newToolTipText;
                    preferredLocation = newPreferredLocation;
                    showTipWindow();
                }
            } else {
                enterTimer.start();
            }
        }
    }

    // implements java.awt.event.MouseListener
    
 Called when the mouse exits the region of a component.
 Any tool tip showing should be hidden.
 @param event  the event in question
/**
     *  Called when the mouse exits the region of a component.
     *  Any tool tip showing should be hidden.
     *
     *  @param event  the event in question
     */
    public void mouseExited(MouseEvent event) {
        boolean shouldHide = true;
        if (insideComponent == null) {
            // Drag exit
        }
        if (window != null && event.getSource() == window && insideComponent != null) {
          // if we get an exit and have a heavy window
          // we need to check if it if overlapping the inside component
            Container insideComponentWindow = insideComponent.getTopLevelAncestor();
            // insideComponent may be removed after tooltip is made visible
            if (insideComponentWindow != null) {
                Point location = event.getPoint();
                SwingUtilities.convertPointToScreen(location, window);

                location.x -= insideComponentWindow.getX();
                location.y -= insideComponentWindow.getY();

                location = SwingUtilities.convertPoint(null, location, insideComponent);
                if (location.x >= 0 && location.x < insideComponent.getWidth() &&
                        location.y >= 0 && location.y < insideComponent.getHeight()) {
                    shouldHide = false;
                } else {
                    shouldHide = true;
                }
            }
        } else if(event.getSource() == insideComponent && tipWindow != null) {
            Window win = SwingUtilities.getWindowAncestor(insideComponent);
            if (win != null) {  // insideComponent may have been hidden (e.g. in a menu)
                Point location = SwingUtilities.convertPoint(insideComponent,
                                                             event.getPoint(),
                                                             win);
                Rectangle bounds = insideComponent.getTopLevelAncestor().getBounds();
                location.x += bounds.x;
                location.y += bounds.y;

                Point loc = new Point(0, 0);
                SwingUtilities.convertPointToScreen(loc, tip);
                bounds.x = loc.x;
                bounds.y = loc.y;
                bounds.width = tip.getWidth();
                bounds.height = tip.getHeight();

                if (location.x >= bounds.x && location.x < (bounds.x + bounds.width) &&
                    location.y >= bounds.y && location.y < (bounds.y + bounds.height)) {
                    shouldHide = false;
                } else {
                    shouldHide = true;
                }
            }
        }

        if (shouldHide) {
            enterTimer.stop();
        if (insideComponent != null) {
                insideComponent.removeMouseMotionListener(this);
            }
            insideComponent = null;
            toolTipText = null;
            mouseEvent = null;
            hideTipWindow();
            exitTimer.restart();
        }
    }

    // implements java.awt.event.MouseListener
    
 Called when the mouse is pressed.
 Any tool tip showing should be hidden.
 @param event  the event in question
/**
     *  Called when the mouse is pressed.
     *  Any tool tip showing should be hidden.
     *
     *  @param event  the event in question
     */
    public void mousePressed(MouseEvent event) {
        hideTipWindow();
        enterTimer.stop();
        showImmediately = false;
        insideComponent = null;
        mouseEvent = null;
    }

    // implements java.awt.event.MouseMotionListener
    
 Called when the mouse is pressed and dragged.
 Does nothing.
 @param event  the event in question
/**
     *  Called when the mouse is pressed and dragged.
     *  Does nothing.
     *
     *  @param event  the event in question
     */
    public void mouseDragged(MouseEvent event) {
    }

    // implements java.awt.event.MouseMotionListener
    
 Called when the mouse is moved.
 Determines whether the tool tip should be displayed.
 @param event  the event in question
/**
     *  Called when the mouse is moved.
     *  Determines whether the tool tip should be displayed.
     *
     *  @param event  the event in question
     */
    public void mouseMoved(MouseEvent event) {
        if (tipShowing) {
            checkForTipChange(event);
        }
        else if (showImmediately) {
            JComponent component = (JComponent)event.getSource();
            toolTipText = component.getToolTipText(event);
            if (toolTipText != null) {
                preferredLocation = component.getToolTipLocation(event);
                mouseEvent = event;
                insideComponent = component;
                exitTimer.stop();
                showTipWindow();
            }
        }
        else {
            // Lazily lookup the values from within insideTimerAction
            insideComponent = (JComponent)event.getSource();
            mouseEvent = event;
            toolTipText = null;
            enterTimer.restart();
        }
    }

    
Checks to see if the tooltip needs to be changed in response to
the MouseMoved event event.
/**
     * Checks to see if the tooltip needs to be changed in response to
     * the MouseMoved event <code>event</code>.
     */
    private void checkForTipChange(MouseEvent event) {
        JComponent component = (JComponent)event.getSource();
        String newText = component.getToolTipText(event);
        Point  newPreferredLocation = component.getToolTipLocation(event);

        if (newText != null || newPreferredLocation != null) {
            mouseEvent = event;
            if (((newText != null && newText.equals(toolTipText)) || newText == null) &&
                ((newPreferredLocation != null && newPreferredLocation.equals(preferredLocation))
                 || newPreferredLocation == null)) {
                if (tipWindow != null) {
                    insideTimer.restart();
                } else {
                    enterTimer.restart();
                }
            } else {
                toolTipText = newText;
                preferredLocation = newPreferredLocation;
                if (showImmediately) {
                    hideTipWindow();
                    showTipWindow();
                    exitTimer.stop();
                } else {
                    enterTimer.restart();
                }
            }
        } else {
            toolTipText = null;
            preferredLocation = null;
            mouseEvent = null;
            insideComponent = null;
            hideTipWindow();
            enterTimer.stop();
            exitTimer.restart();
        }
    }

    protected class insideTimerAction implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(insideComponent != null && insideComponent.isShowing()) {
                // Lazy lookup
                if (toolTipText == null && mouseEvent != null) {
                    toolTipText = insideComponent.getToolTipText(mouseEvent);
                    preferredLocation = insideComponent.getToolTipLocation(
                                              mouseEvent);
                }
                if(toolTipText != null) {
                    showImmediately = true;
                    showTipWindow();
                }
                else {
                    insideComponent = null;
                    toolTipText = null;
                    preferredLocation = null;
                    mouseEvent = null;
                    hideTipWindow();
                }
            }
        }
    }

    protected class outsideTimerAction implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            showImmediately = false;
        }
    }

    protected class stillInsideTimerAction implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            hideTipWindow();
            enterTimer.stop();
            showImmediately = false;
            insideComponent = null;
            mouseEvent = null;
        }
    }

  /* This listener is registered when the tooltip is first registered
   * on a component in order to catch the situation where the tooltip
   * was turned on while the mouse was already within the bounds of
   * the component.  This way, the tooltip will be initiated on a
   * mouse-entered or mouse-moved, whichever occurs first.  Once the
   * tooltip has been initiated, we can remove this listener and rely
   * solely on mouse-entered to initiate the tooltip.
   */
    private class MoveBeforeEnterListener extends MouseMotionAdapter {
        public void mouseMoved(MouseEvent e) {
            initiateToolTip(e);
        }
    }

    static Frame frameForComponent(Component component) {
        while (!(component instanceof Frame)) {
            component = component.getParent();
        }
        return (Frame)component;
    }

  private FocusListener createFocusChangeListener(){
    return new FocusAdapter(){
      public void focusLost(FocusEvent evt){
        hideTipWindow();
        insideComponent = null;
        JComponent c = (JComponent)evt.getSource();
        c.removeFocusListener(focusChangeListener);
      }
    };
  }

  // Returns: 0 no adjust
  //         -1 can't fit
  //         >0 adjust value by amount returned
  private int getPopupFitWidth(Rectangle popupRectInScreen, Component invoker){
    if (invoker != null){
      Container parent;
      for (parent = invoker.getParent(); parent != null; parent = parent.getParent()){
        // fix internal frame size bug: 4139087 - 4159012
        if(parent instanceof JFrame || parent instanceof JDialog ||
           parent instanceof JWindow) { // no check for awt.Frame since we use Heavy tips
          return getWidthAdjust(parent.getBounds(),popupRectInScreen);
        } else if (parent instanceof JApplet || parent instanceof JInternalFrame) {
          if (popupFrameRect == null){
            popupFrameRect = new Rectangle();
          }
          Point p = parent.getLocationOnScreen();
          popupFrameRect.setBounds(p.x,p.y,
                                   parent.getBounds().width,
                                   parent.getBounds().height);
          return getWidthAdjust(popupFrameRect,popupRectInScreen);
        }
      }
    }
    return 0;
  }

  // Returns:  0 no adjust
  //          >0 adjust by value return
  private int getPopupFitHeight(Rectangle popupRectInScreen, Component invoker){
    if (invoker != null){
      Container parent;
      for (parent = invoker.getParent(); parent != null; parent = parent.getParent()){
        if(parent instanceof JFrame || parent instanceof JDialog ||
           parent instanceof JWindow) {
          return getHeightAdjust(parent.getBounds(),popupRectInScreen);
        } else if (parent instanceof JApplet || parent instanceof JInternalFrame) {
          if (popupFrameRect == null){
            popupFrameRect = new Rectangle();
          }
          Point p = parent.getLocationOnScreen();
          popupFrameRect.setBounds(p.x,p.y,
                                   parent.getBounds().width,
                                   parent.getBounds().height);
          return getHeightAdjust(popupFrameRect,popupRectInScreen);
        }
      }
    }
    return 0;
  }

  private int getHeightAdjust(Rectangle a, Rectangle b){
    if (b.y >= a.y && (b.y + b.height) <= (a.y + a.height))
      return 0;
    else
      return (((b.y + b.height) - (a.y + a.height)) + 5);
  }

  // Return the number of pixels over the edge we are extending.
  // If we are over the edge the ToolTipManager can adjust.
  // REMIND: what if the Tooltip is just too big to fit at all - we currently will just clip
  private int getWidthAdjust(Rectangle a, Rectangle b){
    //    System.out.println("width b.x/b.width: " + b.x + "/" + b.width +
    //                 "a.x/a.width: " + a.x + "/" + a.width);
    if (b.x >= a.x && (b.x + b.width) <= (a.x + a.width)){
      return 0;
    }
    else {
      return (((b.x + b.width) - (a.x +a.width)) + 5);
    }
  }


    //
    // Actions
    //
    private void show(JComponent source) {
        if (tipWindow != null) { // showing we unshow
            hideTipWindow();
            insideComponent = null;
        }
        else {
            hideTipWindow(); // be safe
            enterTimer.stop();
            exitTimer.stop();
            insideTimer.stop();
            insideComponent = source;
            if (insideComponent != null){
                toolTipText = insideComponent.getToolTipText();
                preferredLocation = new Point(10,insideComponent.getHeight()+
                                              10);  // manual set
                showTipWindow();
                // put a focuschange listener on to bring the tip down
                if (focusChangeListener == null){
                    focusChangeListener = createFocusChangeListener();
                }
                insideComponent.addFocusListener(focusChangeListener);
            }
        }
    }

    private void hide(JComponent source) {
        hideTipWindow();
        source.removeFocusListener(focusChangeListener);
        preferredLocation = null;
        insideComponent = null;
    }

    /* This listener is registered when the tooltip is first registered
     * on a component in order to process accessibility keybindings.
     * This will apply globally across L&F
     *
     * Post Tip: Ctrl+F1
     * Unpost Tip: Esc and Ctrl+F1
     */
    private class AccessibilityKeyListener extends KeyAdapter implements MenuKeyListener {
        public void keyPressed(KeyEvent e) {
            if (!e.isConsumed()) {
                JComponent source = (JComponent) e.getComponent();
                KeyStroke keyStrokeForEvent = KeyStroke.getKeyStrokeForEvent(e);
                if (hideTip.equals(keyStrokeForEvent)) {
                    if (tipWindow != null) {
                        hide(source);
                        e.consume();
                    }
                } else if (postTip.equals(keyStrokeForEvent)) {
                    // Shown tooltip will be hidden
                    ToolTipManager.this.show(source);
                    e.consume();
                }
            }
        }

        @Override
        public void menuKeyTyped(MenuKeyEvent e) {}

        @Override
        public void menuKeyPressed(MenuKeyEvent e) {
            if (postTip.equals(KeyStroke.getKeyStrokeForEvent(e))) {
                // get element for the event
                MenuElement path[] = e.getPath();
                MenuElement element = path[path.length - 1];

                // retrieve currently highlighted element
                MenuSelectionManager msm = e.getMenuSelectionManager();
                MenuElement selectedPath[] = msm.getSelectedPath();
                MenuElement selectedElement = selectedPath[selectedPath.length - 1];

                if (element.equals(selectedElement)) {
                    // show/hide tooltip message
                    JComponent source = (JComponent) element.getComponent();
                    ToolTipManager.this.show(source);
                    e.consume();
                }
            }
        }

        @Override
        public void menuKeyReleased(MenuKeyEvent e) {}
    }
}